---I called you yesterday, but no one answered.
---I my car when you called me.
A. was washing,
B. washed
C. washing,
D. am washing
网友回答
(答案→)A. was washing,
B. washed
C. washing,
D. am washing
解析：句意：我昨天给你打电话了，但是没有人接。——当你打电话给我时，我正在洗车。结合语境可知下文描述的是过去某时正在进行的动作，故用过去进行时态，选A。